CN102278413B - Helicopter rotor fluid elastic damper and working method thereof - Google Patents
Helicopter rotor fluid elastic damper and working method thereof Download PDFInfo
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- CN102278413B CN102278413B CN2011101326264A CN201110132626A CN102278413B CN 102278413 B CN102278413 B CN 102278413B CN 2011101326264 A CN2011101326264 A CN 2011101326264A CN 201110132626 A CN201110132626 A CN 201110132626A CN 102278413 B CN102278413 B CN 102278413B
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- plain bearing
- spherical plain
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- 239000012530 fluid Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000013016 damping Methods 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims description 39
- 239000007788 liquid Substances 0.000 claims description 30
- 230000008859 change Effects 0.000 claims description 8
- 230000033001 locomotion Effects 0.000 claims description 8
- 238000005987 sulfurization reaction Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010068 moulding (rubber) Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The invention provides a helicopter rotor fluid elastic damper and a working method thereof, belonging to shimmy dampers of a helicopter rotor system. The damper comprises a housing (13), a connecting rod (4) installed in the housing (13), a first spherical plain bearing rod ends (1) and a second spherical plain bearing rod ends (16) respectively installed at upper and lower ends of the housing (13). The first spherical plain bearing rod ends (1) and the upper end of the connecting rod (4) are fixed together. The second spherical plain bearing rod ends (16) and the lower end of the housing (13) are fixed together. An upper bonding body (5), a sleeve (6), and a lower bonding body (12) are successively sleeved in an upper-lower direction between the housing (13) and the connecting rod (4). An oil compensator (9) is also installed at the external side of the sleeve (6) between the upper bonding body (5) and the lower bonding body (12). The helicopter rotor fluid elastic damper and the working method thereof are advantaged by stable dynamic performance, as well as strong capability of vibration damping and eliminating.
Description
Technical field
The present invention is lifting airscrew liquid bullet damper and method of work thereof, belongs to the shimmy damper of lifting airscrew system.
Background technique
The lifting airscrew shimmy damper is one of critical component of lifting airscrew system, and for the lagging motion of rotor blade provides additional damping, coupling rigidity, wild effect takes place to prevent that shimmy back type mode because of blade is coupled with undercarriage or body.
The pattern of damper has a plurality of kinds such as frcition damper, hydraulic damper, viscoelastic damper, liquid bullet damper.Compare friction and hydraulic damper, viscoelastic damper utilizes elastomeric shear deformation that elastic stiffness and damping are provided, and is simple in structure, reliability is high, maintainability good, but the damping that viscoelastic damper can provide is less relatively; And hydraulic damper utilizes flow of liquid to produce pressure difference through aperture to produce damping, but in little amplitude elastic stiffness with damping all along with the frequency increase and reduce, be difficult to sometimes satisfy the demands.
Summary of the invention:
The object of the invention is to provide a kind of dynamic performance stable, vibration damping, lifting airscrew shimmy damper and method of work thereof that the weakening ability is strong.
A kind of lifting airscrew liquid bullet damper; It is characterized in that: comprise shell, be installed on the interior connecting rod of shell, be installed on shell first spherical plain bearing rod end and second spherical plain bearing rod end at two ends up and down respectively; Wherein first spherical plain bearing rod end and small end are fixed, and second spherical plain bearing rod end and shell lower end are fixed; Be set with cohesive body, sleeve, following cohesive body between above-mentioned shell and the connecting rod from top to bottom successively, said cohesive body, sleeve and the following cohesive body gone up is axially fixed on the connecting rod; Between last cohesive body and following cohesive body, the fluid compensator also is installed in the sleeve outside; Has the damping circumferential weld between fluid compensator and the sleeve; Above-mentioned upward cohesive body is the same with following cohesive body structure, comprises metal inner core, rubber layer, metal outer cylinder from the inside to the outside successively, this rubber layer and described metal inner core, metal outer cylinder sulfuration bonding; Above-mentioned shell upper end also is equipped with and is blocked in the outer top cover of metal outer cylinder; Above-mentioned fluid compensator comprises upper end cap and lower end cap; Wherein the bottom of upper end cap top and lower end cap has the working oil chamber that is communicated with the damping circumferential weld; Wherein has annular compensated cavity between upper end cap and the lower end cap; Upper end cap or lower end cap have the compensation channel that annular compensated cavity is communicated with working oil chamber; In the annular compensated cavity annular piston and spring are installed.
The method of work of said lifting airscrew liquid bullet damper; It is characterized in that: when first spherical plain bearing rod end and second spherical plain bearing rod end axially relatively during pulling; First spherical plain bearing rod end drives the metal inner core through connecting rod; Second spherical plain bearing rod end drives metal outer cylinder through shell and top cover, makes the axial relative movement of metal inner core and metal outer cylinder, and rubber layer shear deformation produces elastic stiffness and damping; The axial relative movement of metal inner core and metal outer cylinder causes the variation of upper and lower working oil chamber volume, and it is mobile to cause that fluid is sewn between the upper and lower working oil chamber through damping ring, produces damping; Because the operating time is long, causes that oil liquid temperature changes, and then cause the fluid change in volume; Fluid gets into annular compensated cavity through compensation channel, and annular piston is moved up and down in annular compensated cavity.
This liquid bullet damper has following beneficial effect:
1, this liquid bullet damper combines the advantage of viscoelastic damper and hydraulic damper, has stable dynamic performance and strong vibration damping, weakening ability, and reliability is high.Compare with viscoelastic damper, on the basis that does not increase geometrical scale, can obtain very high coefficient of losses, and coefficient of losses is mild with the amplitude and the change of frequency of vibration.2, the output rigidity and the damping of this liquid bullet damper have adjustable, and to shimmy rigidity of different rotors and damping demand, the rubber or the fluid of adjustment damper portions physical dimension, replacing different materials can be realized.Therefore applied widely, guarantee that the wild effect of " ground resonance " and " aerial resonance ", the Security that improves helicopter do not take place down the helicopter of different model in working order.3, this liquid bullet damper structure is simple, and is in light weight, each parts convenient disassembly, and Maintenance and Repair are very convenient.4, the fluid compensator in this liquid bullet damper has guaranteed the constant volume of liquid bullet damper work fluid, has solved fluid because temperature variation produces the influence that change in volume is brought, and has guaranteed the stable of liquid bullet damper service behaviour, and adaptability is strong.5, the fluid compensator in this liquid bullet damper adopts stiffness spring, and convenient disassembly need not be considered sealing problem with respect to the gas compensation, more is prone on the technology realize, and more is prone to adjustment according to work requirements, well realizes the purpose of fluid compensation.
Description of drawings
Fig. 1 is the sectional view of liquid bullet damper of the present invention;
Fig. 2 is the half-sectional view of liquid bullet damper of the present invention;
Fig. 3 is the amplification view of fluid compensator among the present invention;
Fig. 4 is the sectional drawing of fluid compensator among the present invention;
Fig. 5 is the enlarged diagram of fluid compensator internal structure among the present invention;
Fig. 6 is the sectional view of fluid compensator internal structure among the present invention;
Label title 1. first spherical plain bearing rod ends among the figure, 2. first hexagon nut, 3. first plain washer,
4. connecting rod is 5. gone up cohesive body, 6. sleeve, 7. O shape circle, 8. first Cross Recess Head Screw, 9. fluid compensator; 10. second Cross Recess Head Screw, 11. the 2nd O shapes circle, 12. times cohesive bodies, 13. shells, 14. second plain washers; 15. second hexagon nut, 16. second spherical plain bearing rod ends, 17. the 3rd hexagon nuts, 18. the 3rd plain washers, 19. working oil chambers; 20. lower end cap, 21. springs, 22. annular pistons, 23. annular compensated cavities, 24. upper end caps; 25. compensation channel, 26. damping circumferential welds, 27. metal outer cylinders, 28. rubber layers, 29. metal inner cores; 30. top cover, 31. the 3rd O shapes circles, 32. the 4th O shapes circle, 33. times annular cushion blocks, annular cushion block on 34..
The practical implementation way
Lifting airscrew liquid bullet damper mainly is made up of shell, metal inner/outer tube and rubber bonded body, connecting rod, sleeve, spherical plain bearing rod end and fluid compensator etc., can further specify the present invention in conjunction with accompanying drawing.
In Fig. 1, Fig. 2, showed the integral body and the cut-away view of lifting airscrew liquid bullet damper.This liquid bullet damper mainly is made up of shell 13, metal inner/outer tube and rubber bonded body 5,12, connecting rod 4, sleeve 6, spherical plain bearing rod end 1,16 and fluid compensator 9 etc.Confirm rubber layer 28 materials and size according to rigidity and damping demand; Relative position and rubber-moulding shape by matching die assurance metal inner core 29, urceolus 27 are pressed into whole sulfidization molding between metal inner core 29 and the metal outer cylinder 27 with rubber under HTHP.In this mechanism, form damping ring between sleeve 6 and the fluid compensator 9 and meet 26, select sleeve 6 sizes and fluid material according to the damping demand.During assembling,, upper and lower metal inner/outer tube is linked to each other with rubber bonded body 5,12, sleeve 6, fluid compensator 9, and add hexagon nut 17 and be locked, guarantee the conformity of two metal inner core axial motions through connecting rod 4.Through oil hole filling fluid, after accomplishing, filling screws in screw 8,10 sealed oil-filling holes.After integral body is pressed into liquid bullet damper shell 13, screw in top cover 30, accomplish the assembling of liquid bullet damper.Through the first and second rod end bearings 1,16, rotor fluid damper can play with the rotor blade Valley, paddle connected.
Introduce the method for work of this liquid bullet damper at present.When first and second spherical plain bearing rod ends 1,16 axially spur relatively; First spherical plain bearing rod end 1 drives metal inner core 29 through connecting rod 4; Second spherical plain bearing rod end 16 drives metal outer cylinder 27 through shell 13 and top cover 30, makes metal inner core 29 and metal outer cylinder 27 axial relative movement, and shear deformation takes place rubber layer 28; Because the elasticity of rubber and the interior friction of rubber molecule produce elastic stiffness and damping.The working oil chamber 19 that is formed by upper and lower metal inner/outer tube and rubber bonded body 5,12, fluid compensator 9 and sleeve 6 is divided into two-part by fluid compensator 9; Link to each other through damping circumferential weld 26 between two oil pockets, in working oil chamber 19 and damping circumferential weld 26, all be full of the fluid of high damping.The relative movement of metal inner core 29 and metal outer cylinder 27 causes upper and lower working oil chamber 19 change in volume, causes that fluid meets 26 between upper and lower working oil chamber 19, to flow through damping ring, produces pressure difference, thereby produces viscous damping.
In Fig. 3～Fig. 6, fluid compensator 9 cut-away views of rotor liquid bullet damper have been showed.Fluid compensator 9 comprises upper end cap 24 and lower end cap 20.Upper end cap 24 or lower end cap 20 have the compensation channel 25 that communicates with working oil chamber 19, have the compensated cavity 23 of annular between upper end cap 24 and the lower end cap 20, have annular piston 22 and spring 21 in the annular compensated cavity 23.Go up annular cushion block 34 and evenly have identical groove respectively, be pressed on wherein with the spring 21 of groove quantity with time annular cushion block 33.Go up in the groove of annular piston 22 and lower end cap 20 that annular cushion block 34 and annular cushion block 33 down be pressed into fluid compensator 9 respectively, integral body is pressed in the annular compensated cavity 23 then, compresses upper and lower end cap 24,20, and fluid compensator 9 is accomplished in assembling.
The working principle of fluid compensator in this liquid bullet damper.The operating time of liquid bullet damper increases, and causes that oil liquid temperature changes, owing to expand with heat and contract with cold, the fluid volume can change.Because upper end cap 24 tops have the compensation channel 25 that fluid compensator 9 annular compensated cavities 23 are communicated with working oil chamber 19; When the fluid change in volume; Fluid gets into annular compensated cavity 23 through compensation channel 25; According to the recovery characteristics of spring 21, annular piston 22 can be upper and lower mobile in annular compensated cavity 23, reaches the purpose of fluid compensation.
Part body of the present invention is not unalterable, and the size of metal inner/outer tube, sleeve, fluid compensator and rubber, fluid material all are to change according to job requirement.
Claims (2)
1. lifting airscrew liquid bullet damper is characterized in that:
Comprise shell (13), be installed on the interior connecting rod (4) of shell (13), be installed on shell (13) first spherical plain bearing rod end (1) and second spherical plain bearing rod end (16) at two ends up and down respectively; Wherein first spherical plain bearing rod end (1) is fixing with connecting rod (4) upper end, and second spherical plain bearing rod end (16) is fixed with shell (13) lower end;
Be set with cohesive body (5), sleeve (6), following cohesive body (12) between above-mentioned shell (13) and the connecting rod (4) from top to bottom successively, said cohesive body (5), sleeve (6) and the following cohesive body (12) gone up is axially fixed on the connecting rod (4); Be positioned between cohesive body (5) and the following cohesive body (12) and fluid compensator (9) also be installed in sleeve (6) outside; Has damping circumferential weld (26) between fluid compensator (9) and the sleeve (6);
It is above-mentioned that upward cohesive body (5) is the same with following cohesive body (12) structure; Comprise metal inner core (29), rubber layer (28), metal outer cylinder (27) from the inside to the outside successively, this rubber layer (28) and described metal inner core (29), metal outer cylinder (27) sulfuration bonding;
Above-mentioned shell (13) upper end also is equipped with and is blocked in the outer top cover (30) of metal outer cylinder (27);
Above-mentioned fluid compensator (9) comprises upper end cap (24) and lower end cap (20); Wherein the bottom of upper end cap (24) top and lower end cap (20) has the working oil chamber (19) that is communicated with damping circumferential weld (26); Wherein has annular compensated cavity (23) between upper end cap (24) and the lower end cap (20); Upper end cap (24) or lower end cap (20) have the compensation channel (25) that annular compensated cavity (23) is communicated with working oil chamber (19); In the annular compensated cavity (23) annular piston (22) and spring (21) are installed.
2. according to the method for work of the said lifting airscrew liquid of claim 1 bullet damper, it is characterized in that:
When first spherical plain bearing rod end (1) and second spherical plain bearing rod end (16) axially relatively during pulling; First spherical plain bearing rod end (1) drives metal inner core (29) through connecting rod (4); Second spherical plain bearing rod end (16) drives metal outer cylinder (27) through shell (13) and top cover (30); Make the axially relative movement of metal inner core (29) and metal outer cylinder (27), rubber layer (28) shear deformation produces elastic stiffness and damping;
The axial relative movement of metal inner core (29) and metal outer cylinder (27) causes the variation of upper and lower working oil chamber (19) volume, causes that fluid flows between upper and lower working oil chamber (19) through damping circumferential weld (26), produces damping;
Because the operating time is long, causes that oil liquid temperature changes, and then cause the fluid change in volume; Fluid gets into annular compensated cavity (23) through compensation channel (25), and annular piston (22) is moved up and down in annular compensated cavity (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101326264A CN102278413B (en) | 2011-05-23 | 2011-05-23 | Helicopter rotor fluid elastic damper and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101326264A CN102278413B (en) | 2011-05-23 | 2011-05-23 | Helicopter rotor fluid elastic damper and working method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102278413A CN102278413A (en) | 2011-12-14 |
| CN102278413B true CN102278413B (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101326264A Expired - Fee Related CN102278413B (en) | 2011-05-23 | 2011-05-23 | Helicopter rotor fluid elastic damper and working method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104776151B (en) * | 2015-04-22 | 2018-06-05 | 武汉理工大学 | A kind of device for preventing leakage of fluid damper |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0583868A1 (en) * | 1992-08-04 | 1994-02-23 | Sumitomo Rubber Industries Limited | Vibration damping device |
| CN201236920Y (en) * | 2008-07-18 | 2009-05-13 | 南京捷诺环境技术有限公司 | Fast-detaching damping-adjustable push rod vibration isolator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007046442A (en) * | 2005-07-13 | 2007-02-22 | Sugimoto Kenchiku Kenkyusho:Kk | Vibration damping panel and vibration damping structure of building |
| US20090014930A1 (en) * | 2005-11-15 | 2009-01-15 | Fukoku Co., Ltd | Liquid sealed mount and method of assembling the same |
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2011
- 2011-05-23 CN CN2011101326264A patent/CN102278413B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0583868A1 (en) * | 1992-08-04 | 1994-02-23 | Sumitomo Rubber Industries Limited | Vibration damping device |
| CN201236920Y (en) * | 2008-07-18 | 2009-05-13 | 南京捷诺环境技术有限公司 | Fast-detaching damping-adjustable push rod vibration isolator |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2007-46442A 2007.02.22 |
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| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wu Shen Inventor after: Yang Weidong Inventor after: Li Jiachun Inventor after: Zhu Chengcheng Inventor before: Wu Shen Inventor before: Zhu Chengcheng Inventor before: Li Jiachun Inventor before: Yang Weidong |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WU ZHU CHENGCHENG LI JIACHUN YANG WEIDONG TO: WU YANG WEIDONG LI JIACHUN ZHU CHENGCHENG |
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Granted publication date: 20121128 Termination date: 20210523 |